Which system controls body functions through hormones?

The appropriate system that controls body functions through hormones is the endocrine system. This system is responsible for the production and secretion of hormones, which are chemical messengers that travel through the bloodstream to various tissues and organs. Hormones regulate numerous bodily functions, including growth and development, metabolism, sexual function, reproduction, and mood.

The endocrine system is made up of various glands, such as the pituitary, thyroid, adrenals, and pancreas, each contributing to the regulation of different bodily processes. By releasing hormones, the endocrine system communicates and coordinates activities across the body, ensuring that various functions are harmonized for optimal health and homeostasis.

In contrast, the nervous system functions primarily through electrical impulses and neurotransmitters to communicate quickly within the body, and while it plays a vital role in bodily functions, it does not depend on hormones for control. The digestive system focuses on breaking down food and nutrient absorption rather than hormone regulation. The immune system is responsible for defending against pathogens and does not directly control body functions through hormones. Therefore, the endocrine system is distinctly recognized for its role in hormonal control.